Recording pressure-gage



(No Model.)

P. A. JONES & S. GLINES.

RECORDING PRESSURE GAGE.

No. 287,684. Patented Oct. 30, 1883.

WITNESSES v 1 \/ENTEIR5 UNrrnD STATES PATENT OFFICE.

FLORENTINE A. JONES, OF NEYV YORK, N. Y., AND SYLVESTER GLINES, OF

' BOSTON, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 287,684, dated October30, 1883.

Application filed May 19, 1883. (No model.)}

To all whom it may concern.-

Be it known that we, FLORENTINE A. J oNEs, of the city, county, andState of New York, and SYLVESTER GLINEs, of Boston, in the county ofSuffolk and State of Massachusetts, have invented new and usefulImprovements in Recording Pressure-Gages, of which the following is aspecification.

Our invention relates to improved mechan- IO ism for the purpose ofshowing the extent and variations of pressure in steam-boilers,cylinders, or other vessels containing air, gas, liquid, or otherfluids; and it consists more particularly in the construction andadaptation of I 5 such mechanism in combination with the socalledBourdon spring or its attendant mechanism, .in amanner to show by marksor delineations upon a chart or dial the variations of pressure and arecord of the same.

In the accompanying drawings, in which similar letters of referenceindicate like parts, Figure 1 is a plan view of our improved recordingpressuregage with the dial of the steamgage removed. Fig. 2 is anenlarged side elevation of the standard Ldetached. Fig. 3isa detailedelevation of the pointer. Fig. 4 is a sectional view of the mechanismfor holding the dial. Fig. 5 is an enlarged section of the pointer. Fig.6 is a plan of a modification below described.

A represents one side of a circular box, connected to the other half, A,at B, havinga recess at C for the accommodation of the c011- nectingmechanism.

D represents a Bourdon spring, and E the ordinary mechanism of asteam-gage, consisting, essentially, of a segmental rack, e, pivotednear its rear end and meshing into a pinion carrying the pointer K.

P is a link connecting the spring D with the mechanism E, which givesmovement to the pointer K, showing, in connection with a dial, thesteanrpressure.

Except the arrangement of the boxes, the 45 foregoing relates to a formof steam-gage in common use.

We will 110w proceed to describe the parts which relate to our inventionand the arrangement of the same.

G- is a dial, made of paper or other suitable material, rotated by aclock-movement, and having upon its surface twenty-four radial curvedlines, 5 corresponding with the number of hours in a day, and a certainnumber of concentric circlesmz, corresponding with the press- 5 5 ureindicated upon the dial of the steamgage.

The dial-wheel 0 of the clock-movement is provided with a shouldered hubn, and acircular disk, 8, said hub havin g a threaded pivot,

a, extending from it, above the surface of the disk Z), above which is abutton, 0, screwed upon said pivot a, thus allowing of the changing ofthe dial with facility, it being held between the two disks by thefriction caused by screwing the button a down upon the disk I). 6 5'Instead of the dial-wheel being provided with a pivot, it might have athreaded central hole, and the button a mighthave a pivot with a threadupon it to screw into the threaded hole in the dial.-wheel, and thuspress the disk 1) upon the dial, which may rotate once in twenty-fourhours, or at a faster or slower speed, if desired.

H is a lever, crooked for convenience, and pivoted at h to the standardL, so as to freely swing back and forth. It is also provided at its freeend with the vertically-pivoted holding-bar t, in which is placed thepencil or pointer holder j, provided with the pencil or pointer j, whichis regulated and held in place by the screw or follower z.

o is a spring, one end of which is secured to the under side of thelever H, and the other end presses upwardly on the rear end of the bari, thus having atendency to hold the front 8 end of said bar .down, andhence hold the pointer on the dial. Thebar is prefcrablypivoted to theleverHin the manner shownviz., by slotting it and squaring the end ofthe lever, leaving a tongue, 00, to enter the slot and hold 0 the saidban, which may be turned back (upward) whenever it is necessary tochange the dial. (See Fig. 3.) The standard L, into which is pivoted thelong vertical rod Z, Fig.

2, allows the lever H to swing freely, but with- 9 5 out lost motion.

n; is a slot near the rear end of the lever H, by means of which theconnecting-rod M is attached thereto,at such a distance from the fulcrumas to insure any desired movement of I00 the said lever, the other endof said connecting-rod being pivoted at p to the Bourdon spring D. Thisrod M should be free, but not unduly so, to make its movement.

The operation is as follows: Steam or other fluid enters the hollowspring D through the hollow plug R, and the pressure acting onthe innersurface of the spring causes it to expand or contract as the pressure isgreater or less, and this movement is communicated by means of the rod Mto the lever H, thus causing the marker j at the end of the lever tovibrate with the movement of the spring, and with the pointer K upon thedial of thesteamgage. The pencil j, pressing lightly onthe dial G, givesa delineation of the, pressure, as indicated by the concentric lines mand figures, and the time at which any change has taken place in thepressure is shown by the relative position of the indication or mark ofthe pencil and the eurvedlines g, andthe figures,from one to twelve, atthe ends of the curved lines, which indicate the hours, it beingunderstood that the dial rotates once in twenty-fourhours, and is movedby a clock-work. (Not shown in the drawings, nor the cover of saidclockwork.) It will thus be seen that an exact delineation or chart ofthe pressure and the time of any and all changes therein is shown uponthe dial G, which can be preserved for future reference.

It is not necessary that the connection with the spring D should be madein the exact manner described, nor at the particular point shown, for aconnection could be made at any point on a Bourdon spring, where therequisite movement can be obtained.

In the modification shown in Fig. 6 the rod M is pivoted to the link 1instead of to the end of the spring, and it will readily be seen requirean even,

that it could be pivoted to the rear end of the rack c with similarresults.

- We are aware that it is not novel to applya pencil or pointer to theend of a lever inarecording pressure-gage; also, that neither a threadedfollower nor apivoted pointer-bar is new in itself considered. Thenovelty of this portion of our invention consists in the combination ofparts as arranged and constructed.

The value of this invention does not alone consist in its being anadditional safeguard to the lives and property of steam users, butit isof great practical value to all whose operations constant, and uniformdegree of heat. 7

Having thus fully described our invention, what we claim, and desire tosecure by Letters Patent, is-

1. In a recording pressure-gage, the combination'of the followingelements, viz. a Bourdon spring, a multiplying-lever, and suitableintermediate mechanism, said lever bearing a delineating or recordingdevice, whereby the extent and variations of pressure may be recorded,substantially as and for the purpose set forth.

2'. In a recording pressure-gage, the combination of the lever H, thepointer-bar z, pivoted at i to said lever, the spring 12, securedrigidlyat one end to the under side of said lever, and with its free endbearing against the rear under portion of said pointer-bar, the pointerj j, and the threaded follower'z, all arranged and constructedsubstantially as and for the purpose described.

FLORENTINE A. JONES. SYLVESTER GLINES. \Vitnesscs:

I HENRY W. WILLIAMS,

J osnrn ISHBAUGH.

